SCES991 June   2025 TXG8020 , TXG8021

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Electrical Characteristics
    5. 5.5 Switching Characteristics, VCCA = 1.8 ± 0.15V
    6. 5.6 Switching Characteristics, VCCA = 2.5 ± 0.2V
    7. 5.7 Switching Characteristics, VCCA = 3.3 ± 0.3V
    8. 5.8 Switching Characteristics, VCCA = 5.0 ± 0.5V
    9. 5.9 Switching Characteristics: Tsk, TMAX
  7. 6 Parameter Measurement Information
    1. 6.1 Load Circuit and Voltage Waveforms
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 CMOS Schmitt-Trigger Inputs with Integrated Pulldowns
        1. 7.3.1.1 Inputs with Integrated Static Pull-Down Resistors
      2. 7.3.2 Balanced High-Drive CMOS Push-Pull Outputs
      3. 7.3.3 VCC Disconnect
      4. 7.3.4 Over-Voltage Tolerant Inputs
      5. 7.3.5 Glitch-Free Power Supply Sequencing
      6. 7.3.6 Negative Clamping Diodes
      7. 7.3.7 Fully Configurable Dual-Rail Design
      8. 7.3.8 Supports High-Speed Translation
      9. 7.3.9 AC Noise Rejection
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Regulatory Requirements
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5.4 Electrical Characteristics

over operating free-air temperature range (unless otherwise noted)(1) (2)
PARAMETER TEST CONDITIONS VCCA VCCB Operating free-air temperature (TA) UNIT
–40°C to 125°C
MIN TYP MAX
VOH High-level output voltage (3) IOH = –4.5mA 1.71V 1.71V 1.5 V
IOH = –8mA 2.3V 2.3V 2.0
IOH = –10mA 3V 3V 2.7
IOH = –12mA 4.5V 4.5V 4.1
VOL Low-level output voltage (4) IOL = 4.5mA 1.71V 1.71V 0.16 V
IOL = 8mA 2.3V 2.3V 0.27
IOL = 10mA 3V 3V 0.34
IOL = 12mA 4.5V 4.5V 0.41
VT+ Positive-going input-threshold voltage Data Inputs
(Ax, Bx)
(Referenced to VCCI)		 1.71V 1.71V 1.11 V
2.3V 2.3V 1.40
3V 3V 1.73
4.5V 4.5V 2.45
5.5V 5.5V 3.0
VT- Negative-going input-threshold voltage Data Inputs
(Ax, Bx)
(Referenced to VCCI)		 1.71V 1.71V 0.56 V
2.3V 2.3V 0.80
3V 3V 1.14
4.5V 4.5V 1.59
5.5V 5.5V 2.0
ΔVT Input-threshold hysteresis
(VT+ – VT-)		 Data Inputs
(Ax, Bx)
(Referenced to VCCI)		 1.71V 1.71V 0.3 0.55 V
2.3V 2.3V 0.36 0.60
3V 3V 0.38 0.54
4.5V 4.5V 0.41 0.86 V
ΔVT Input-threshold hysteresis
(VT+ – VT-)		 Data Inputs
(Ax, Bx)
(Referenced to VCCI)		 5.5V 5.5V 0.40 0.96 V
II Input leakage current Data Inputs
(Ax, Bx)
VI = VCCI or GND		 1.71V – 5.5V 1.71V – 5.5V 0.2 1.6 µA
Ioff-float Floating supply Partial power down current A Port or B Port
VI = VCC		 Floating(5) 0V - 5.5V 0.26 1.55 µA
0V - 5.5V Floating(5) 0.26 1.55
Ci Control Input Capacitance VI = 3.3V or VGNDA 3.3V 3.3V 2 pF
Cio Data I/O Capacitance VO = 1.71V DC +1MHz -16dBm sine wave 3.3V 3.3V 1.3 2.6 pF
CGND Cap between grounds All channels combined
(VCC both sides are powered on)		 46 pF
All channels combined
(VCC to GND shorted)		 53 pF
Leakage Current Leakage between GndA to GndB All channels combined
(VCC both sides are powered on and inputs are all low)		 1.71V – 5.5V 1.71V – 5.5V 1.8 µA
All channels combined
(VCC both sides are powered on and inputs are all high)		 1.71V – 5.5V 1.71V – 5.5V 32 µA
All channels combined
(VCC to GND shorted)		 1.71V – 5.5V 1.71V – 5.5V 1.8 µA
CMTI Common Mode Transient Immunity Input toggling at 100Mbps
Ground shift up to 80V		 1.71V – 5.5V 1.71V – 5.5V 250 V/µs
TXGx021
ICCA VCCA supply current VI = VCCI or GND
IO = 0		 1.71V – 5.5V 1.71V – 5.5V 300 747 µA
0V 5.5V -2 12.5
5.5V 0V 349 589
VI = GND
IO = 0		 5.5V Floating(5) 347 577
ICCB VCCB supply current VI = VCCI or GND
IO = 0		 1.71V – 5.5V 1.71V – 5.5V 497 1077 µA
0V 5.5V 546 919
5.5V 0V -2 24.5
VI = GND
IO = 0		 Floating(5) 5.5V 548 919
ICCA + ICCB Supply Current - DC Signal VI = VCCI  1.8V 1.8V 0.7 1.6 mA
2.5V 2.5V 0.8 1.6
3.3V 3.3V 0.8 1.7
5V 5V 0.8 1.9
VI = GND 1.8V 1.8V 0.7 1.6 mA
2.5V 2.5V 0.8 1.6
3.3V 3.3V 0.8 1.7
5V 5V 0.8 1.9
ICCA + ICCB Supply Current - AC Signal All channels switching with square wave clock input; CL = 15pF, 1Mbps 1.8V 1.8V 0.9 1.6 mA
2.5V 2.5V 0.9 1.6
3.3V 3.3V 0.9 1.7
5V 5V 1.1 2
All channels switching with square wave clock input; CL = 15pF, 50Mbps 1.8V 1.8V 4.6 6.3 mA
2.5V 2.5V 5.5 7.3
3.3V 3.3V 6.8 8.2
5V 5V 8.7 10.7
All channels switching with square wave clock input; CL = 15pF, 100Mbps 1.8V 1.8V 8.5 10.6 mA
2.5V 2.5V 10 13
3.3V 3.3V 12 14.7
5V 5V 16.6 20.2
TXGx020
ICCA VCCA supply current VI = VCCI or GND
IO = 0		 1.71V – 5.5V 1.71V – 5.5V 299 602 µA
0V 5.5V -2.5 1.2 µA
5.5V 0V 302 602 µA
VI = GND
IO = 0		 5.5V Floating(5) 299 577 µA
ICCB VCCB supply current VI = VCCI or GND
IO = 0		 1.71V – 5.5V 1.71V – 5.5V 504 1225 µA
0V 5.5V 486 906 µA
5.5V 0V -2 24.5 µA
VI = GND
IO = 0		 Floating(5) 5.5V 486 906 µA
ICCA + ICCB Supply Current - DC Signal VI = VCCI  1.8V 1.8V 0.7 1.6 mA
2.5V 2.5V 0.8 1.6 mA
3.3V 3.3V 0.8 1.7 mA
5V 5V 0.8 1.9 mA
VI = GND 1.8V 1.8V 0.7 1.6 mA
2.5V 2.5V 0.8 1.6 mA
3.3V 3.3V 0.8 1.7 mA
5V 5V 0.8 1.9 mA
ICCA + ICCB Supply Current - AC Signal All channels switching with square wave clock input; CL = 15pF, 1Mbps 1.8V 1.8V 0.9 1.6 mA
2.5V 2.5V 0.9 1.6 mA
3.3V 3.3V 0.9 1.7 mA
5V 5V 1.1 2 mA
All channels switching with square wave clock input; CL = 15pF, 50Mbps 1.8V 1.8V 4.5 6.3 mA
2.5V 2.5V 5.5 7.3 mA
3.3V 3.3V 6.3 8 mA
5V 5V 8.4 10.7 mA
All channels switching with square wave clock input; CL = 15pF, 100Mbps 1.8V 1.8V 8.5 10.7 mA
2.5V 2.5V 10 13 mA
3.3V 3.3V 12 14.7 mA
5V 5V 16.6 20.2 mA
VUVLO+ Positive-Going Undervoltage Lockout Voltage A Supply 1.71V – 5.5V 1.55 V
B Supply 1.71V – 5.5V 1.55 V
VUVLO- Negative-Going Undervoltage Lockout Voltage A Supply 1.71V – 5.5V 1.36 V
B Supply 1.71V – 5.5V 1.36 V
VUVLO_Hys Undervoltage Lockout Hysteresis A Supply 1.71V – 5.5V 145 mV
B Supply 1.71V – 5.5V 145 mV
(1) VCCI is the VCC associated with the input port and referenced to GNDA
(2) VCCO is the VCC associated with the output port and referenced to GNDB
(3) Tested at VI = VT+(MAX)
(4) Tested at VI = VT-(MIN)
(5) Floating is defined as a node that is both not actively driven by an external device and has leakage not exeeding 10nA